C++ (Cpp) mlx4_en_prepare_rx_desc Examples

Example #1

static int mlx4_en_fill_rx_buffers(struct mlx4_en_priv *priv)
{
	struct mlx4_en_dev *mdev = priv->mdev;
	struct mlx4_en_rx_ring *ring;
	int ring_ind;
	int buf_ind;

	for (buf_ind = 0; buf_ind < priv->prof->rx_ring_size; buf_ind++) {
		for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
			ring = &priv->rx_ring[ring_ind];

			if (mlx4_en_prepare_rx_desc(priv, ring,
						    ring->actual_size)) {
				if (ring->actual_size < MLX4_EN_MIN_RX_SIZE) {
					mlx4_err(mdev, "Failed to allocate "
						       "enough rx buffers\n");
					return -ENOMEM;
				} else {
					if (netif_msg_rx_err(priv))
						mlx4_warn(mdev,
							  "Only %d buffers allocated\n",
							  ring->actual_size);
					goto out;
				}
			}
			ring->actual_size++;
			ring->prod++;
		}
	}
out:
	return 0;
}

Example #2

static int mlx4_en_fill_rx_buf(struct net_device *dev,
			       struct mlx4_en_rx_ring *ring)
{
	struct mlx4_en_priv *priv = netdev_priv(dev);
	int num = 0;
	int err;

	while ((u32) (ring->prod - ring->cons) < ring->actual_size) {
		err = mlx4_en_prepare_rx_desc(priv, ring, ring->prod &
					      ring->size_mask);
		if (err) {
			if (netif_msg_rx_err(priv))
				mlx4_warn(priv->mdev,
					  "Failed preparing rx descriptor\n");
			priv->port_stats.rx_alloc_failed++;
			break;
		}
		++num;
		++ring->prod;
	}
	if ((u32) (ring->prod - ring->cons) == ring->size)
		ring->full = 1;

	return num;
}

Example #3

File: mlx4_en_rx.c Project: 2trill2spill/freebsd

static int mlx4_en_fill_rx_buffers(struct mlx4_en_priv *priv)
{
	struct mlx4_en_rx_ring *ring;
	int ring_ind;
	int buf_ind;
	int new_size;
	int err;

	for (buf_ind = 0; buf_ind < priv->prof->rx_ring_size; buf_ind++) {
		for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
			ring = priv->rx_ring[ring_ind];

			err = mlx4_en_prepare_rx_desc(priv, ring,
						      ring->actual_size);
			if (err) {
				if (ring->actual_size == 0) {
					en_err(priv, "Failed to allocate "
						     "enough rx buffers\n");
					return -ENOMEM;
				} else {
					new_size =
						rounddown_pow_of_two(ring->actual_size);
					en_warn(priv, "Only %d buffers allocated "
						      "reducing ring size to %d\n",
						ring->actual_size, new_size);
					goto reduce_rings;
				}
			}
			ring->actual_size++;
			ring->prod++;
		}
	}
	return 0;

reduce_rings:
	for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
		ring = priv->rx_ring[ring_ind];
		while (ring->actual_size > new_size) {
			ring->actual_size--;
			ring->prod--;
			mlx4_en_free_buf(ring,
			    ring->mbuf + ring->actual_size);
		}
	}

	return 0;
}

Example #4

File: en_rx.c Project: namanM003/Operating-Systems-CSE-506-

static int mlx4_en_fill_rx_buffers(struct mlx4_en_priv *priv)
{
	struct mlx4_en_rx_ring *ring;
	int ring_ind;
	int buf_ind;
	int new_size;

	for (buf_ind = 0; buf_ind < priv->prof->rx_ring_size; buf_ind++) {
		for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
			ring = priv->rx_ring[ring_ind];

			if (mlx4_en_prepare_rx_desc(priv, ring,
						    ring->actual_size,
						    GFP_KERNEL | __GFP_COLD)) {
				if (ring->actual_size < MLX4_EN_MIN_RX_SIZE) {
					en_err(priv, "Failed to allocate enough rx buffers\n");
					return -ENOMEM;
				} else {
					new_size = rounddown_pow_of_two(ring->actual_size);
					en_warn(priv, "Only %d buffers allocated reducing ring size to %d\n",
						ring->actual_size, new_size);
					goto reduce_rings;
				}
			}
			ring->actual_size++;
			ring->prod++;
		}
	}
	return 0;

reduce_rings:
	for (ring_ind = 0; ring_ind < priv->rx_ring_num; ring_ind++) {
		ring = priv->rx_ring[ring_ind];
		while (ring->actual_size > new_size) {
			ring->actual_size--;
			ring->prod--;
			mlx4_en_free_rx_desc(priv, ring, ring->actual_size);
		}
	}

	return 0;
}